Celebrating 20 years of selling the highest quality parts at the lowest prices. Guaranteed.

"Keep up the good work,"

"I ordered intake testsers and was able to find the leaks that Ford couldn't. The silicone vacuum hose works great!! Thick walled no collapse, a RARE FIND!!"

"[Thanks] For a great product. Huge improvement over the stock fluidyne. Unbeatable price too. My truck never ran better."

"Hi There, Nothing to say but AWESOME! Thanks for your great service and really really fast shipment. I'll pass your site on to my friends."

"Hey there, You have done an excellent job. I'll certainly dig it and personally recommend to my friends. I am confident they'll be benefited from this web site."

"Thanks for the response. We have an inside joke that you guys only hire ninjas with how fast your service is. SIS is definitely the first place I check for parts. You guys have a great thing going on there. Thanks!"